Knežević, Željka; Majer, Marija; Pasariček, Luka; Davídková, Marie; Navrátil, Matěj; Vondráček, Vladimír (2024) Dose measurements with radiophotoluminescent glass dosimeters (GD- 352M and GD-302M) in therapeutic proton beams. Radiation Measurements, 176 . ISSN 1350-4487
Abstract
Radiophotoluminescent glass dosimeters (RPLDs) are increasingly used, especially to measure the doses in therapeutic beams, but the reported data are mainly related to photon and electron beams, while the data for proton beams are limited and not always consistent. In this study, dose measurements were performed with two types of RPLDs: GD-352M and GD-302 M (Asahi Techno Glass Corporation). The dose dependence, long-term fading and response in different Spread out Bragg Peak (SOBP) configurations were evaluated. The dose dependence was measured in the middle of the SOBP for doses ranging from 1 Gy to 120 Gy and a linear dose response was shown for both types of RPLDs. The long-term fading of RPLDs irradiated with proton beams determined under normal ambient conditions over a period of one year is negligible. The GD-352M and GD-302M responses were evaluated in different configurations of the SOPB. The fluence-averaged (LETf) and dose-averaged (LETd) LET values at the positions of the dosimeters were calculated using the PHITS Monte Carlo code. GD-302 M results showed a small under-response compared to the doses provided by treatment planning system (TPS) (within 1.9 %). GD-352M showed an under-response compared to TPS doses for all investigated ranges and modulations with an average under-response of 20 %,indicating the need for correction factors. Both types showed a slight decrease in the response with an increase in the LET.
| Item Type: | Article | ||||||||
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| Uncontrolled Keywords: | proton beam ; dose measurements in SOBP ; RPL dosimeters ; GD-352M ; GD-302M fading | ||||||||
| Subjects: | NATURAL SCIENCES > Physics > Biophysics and Medical Physics NATURAL SCIENCES > Interdisciplinary Natural Sciences > Radiation Science |
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| Divisions: | Division of Materials Chemistry | ||||||||
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| Depositing User: | Željka Knežević Medija | ||||||||
| Date Deposited: | 19 Dec 2025 06:59 | ||||||||
| URI: | http://fulir.irb.hr/id/eprint/10334 | ||||||||
| DOI: | 10.1016/j.radmeas.2024.107204 |
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